Question

good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated.

Answer 1

Answer:

3rd option

Step-by-step explanation:

the explicit formula for a geometric sequence is

$a_{n}$ = a₁ $(r)^{n-1}$

where a₁ is the first term and r the common ratio

here a₁ = - 4 and r = $\frac{a_{2} }{a_{1} }$ = $\frac{12}{-4}$ = - 3 , then

$a_{n}$ = - 4 $(-3)^{n-1}$